. >> one week after confessing to killing his mother, former death row inmate ask double murderer dennis stanworth was back before a judge today to enter a plea. >> one week after he confessed to killing his mother in an emotional outburst, former death row instatemate stayed mostly quiet this, time, the 70-year-old entered a not guilty plea plae to the murder of nellie stanworth in his home. last week he said he was guilty. >> right. >> it's a standard plea in any case so that is what he entered today. >> in the a surprise? >> no. no. >> this prosecutor says nellie stanworth was likely killed in early november. saying the autopsy revealed it was murder. saying it did not appear his wife knew about the death though the body had been on the property sometime. stanworth spent seven years on death row for killing two teenagers in 1966 for a series of kidnap rapes before and after. in the 70s, california overturned the death penalty. last week stanworth blurted quote i plead guilty to everything. i did everything. this is the third one. this time, he said little. except to ask for a device f